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path: root/go/ui/textBox.go
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package ui

import (
	"fmt"
	"image/color"

	"github.com/hajimehoshi/ebiten/v2"
	"github.com/hajimehoshi/ebiten/v2/text"
	"muhq.space/muhqs-game/go/font"
	"muhq.space/muhqs-game/go/game"
)

var (
	TEXTBOX_DEFAULT_BACKGROUND = gray
	TEXTBOX_DEFAULT_FOREGROUND = color.White

	TEXTBOX_DEFAULT_MARGIN = 3
)

type TextBox struct {
	WidgetBase
	Text    string
	Fg      color.Color
	Bg      color.Color
	XMargin int
	YMargin int
	Center  bool
}

func NewFixedTextBox(x, y int, width, height int, t string, center bool) *TextBox {
	tb := &TextBox{
		WidgetBase: NewWidgetBase(x, y, width, height),
		Text:       t,
		Fg:         TEXTBOX_DEFAULT_FOREGROUND,
		Bg:         TEXTBOX_DEFAULT_BACKGROUND,
		XMargin:    TEXTBOX_DEFAULT_MARGIN,
		YMargin:    TEXTBOX_DEFAULT_MARGIN,
		Center:     center,
	}
	tb.renderImpl = func() *ebiten.Image { return tb.render() }
	return tb
}

func NewCenteringFixedTextBox(x, y int, width, height int, t string) *TextBox {
	return NewFixedTextBox(x, y, width, height, t, true)
}

func NewAutoTextBox(x, y int, t string) *TextBox {
	return NewFixedTextBox(x, y, -1, -1, t, false)
}

func NewCenteringAutoTextBox(x, y int, t string) *TextBox {
	return NewFixedTextBox(x, y, -1, -1, t, true)
}

func NewUnitInfo(x, y int, u *game.Unit) *TextBox {
	info := fmt.Sprintf("%s\nDamage: %d\nHealth: %d\nUpkeep: %d",
		u.String(), u.GetDamage(), u.Health, u.Upkeep)

	if u.Movement != game.INVALID_MOVEMENT() {
		info = fmt.Sprintf("%s\nMovement: %s", info, u.Movement.String())
	}

	if u.Attack != game.INVALID_ATTACK() {
		info = fmt.Sprintf("%s\nAttack: %s", info, u.Attack.String())
	}

	return NewAutoTextBox(x, y, info)
}

func NewPermInfo(x, y int, p game.Permanent) *TextBox {
	info := fmt.Sprintf("%s\nDamage: %d",
		p.String(), p.GetDamage())
	return NewAutoTextBox(x, y, info)
}

func (tb *TextBox) render() *ebiten.Image {
	var x, y int
	b := text.BoundString(font.Font24, tb.Text)
	if tb.Width == -1 || tb.Height == -1 {
		tb.Width = b.Dx() + 2*tb.XMargin
		tb.Height = b.Dy() + 2*tb.YMargin
		x = tb.XMargin + b.Min.X
		y = tb.YMargin - b.Min.Y
	} else {
		if !tb.Center {
			x = tb.XMargin + b.Min.X
		} else {
			x = (tb.Width - b.Dx()) / 2
			if x < 0 {
				x = 0
			}
		}

		y = tb.Height - b.Dy()/2
		if y < 0 {
			y = 0
		}
	}

	img := ebiten.NewImage(tb.Width, tb.Height)
	img.Fill(tb.Bg)
	text.Draw(img, tb.Text, font.Font24, x, y, tb.Fg)
	return img
}

type PocList struct {
	TextBox
	centerX int
	bottomY int
	poc     game.PileOfCards
}

func NewPocList(centerX, bottomY int, poc game.PileOfCards) *PocList {
	w := &PocList{
		TextBox: TextBox{
			WidgetBase: NewWidgetBase(-1, -1, -1, -1),
			Text:       "",
			Fg:         TEXTBOX_DEFAULT_FOREGROUND,
			Bg:         TEXTBOX_DEFAULT_BACKGROUND,
			XMargin:    TEXTBOX_DEFAULT_MARGIN,
			YMargin:    TEXTBOX_DEFAULT_MARGIN,
			Center:     true,
		},
		centerX: centerX,
		bottomY: bottomY,
		poc:     poc,
	}
	w.renderImpl = func() *ebiten.Image {
		w.setText()
		return w.render()
	}
	return w
}

func (w *PocList) setText() {
	t := ""
	for _, c := range w.poc.GetCards() {
		t = fmt.Sprintf("%s%s\n", t, c.Name)
	}

	if t != "" {
		w.Text = t[:len(t)-1]
	} else {
		w.Text = "No cards"
	}

	b := text.BoundString(font.Font24, w.Text)
	w.X = w.centerX - b.Dx()/2 - w.XMargin
	w.Y = w.bottomY - b.Dy() - w.YMargin
}

func (w *PocList) FindObjectAt(x, y int) interface{} {
	cards := w.poc.GetCards()
	if len(cards) == 0 {
		return nil
	}

	// b := text.BoundString(font.Font, w.Text)
	// i := b.Dy() / w.poc.Size()
	return cards[0]
}